Operating mechanism for car-doors.



A. CAMPBELL.

OPERATING MECHANISM FOR CAR DOORS. APPLICATION FILED FEB. 1|. 1916.

l 1 92,986 Patented Aug. 1, 1916.

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mTED STATES PATENT OFFICE.

ARGYLE CAMPBELL, 0F CHICAGO, ILLINOIS, ASSIGNOR TO ENTERPRISE RAILWAYEQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

OPERATING MECHANISM FOR CAR-DOORS.

Specification of Letters Patent.

Patented Aug. 1, 1916.

Application filed February 11, 1916. Serial N o. 77,620.

To all whom t may concern:

Be it known that I, ARGYLE CAMPBELL, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Operating Mechanism forCar-Doors, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

This invention relates to improvements in operating mechanism for cardoors.

One object of the invention is to provide a simple, cheap and efficientarrangement of the locking means for car door and other 'operatingshafts of a similar nature.

Another object of the-invention is to provide means on a pawl whichcoperates with a ratchet and on the lock or dog which c0- operates withthe pawl so arranged that said pawl and lock may be readily operated bythe same claw bar'or other tool used in operating the shaft. Inaddition, the parts are so arranged that the shaft, pawl and lock arerotated in the same direction when opening the doors or closing thedoors, thereby facilitating the operations.

The invention furthermore consists in improvements in the parts anddevices and in the novel combinations of the parts and devices hereinshown, described 0ry claimed.

In the drawing forming a part of this specification, Figure 1 is a sideelevation of a portion of a dump car illustrating my improvementsapplied thereto. Fig. 2 is a transverse, sectional view of a portion ofa car and taken approximately on the line 2 2 of Fig. 1. Fig. 3 is adetail, sectional view taken substantially on the line 3-3 of F ig. 1and illustrating more particularly the method of mounting the pawl andlock, and Figs. 4 and 5 are detail sectional views correspondingsubstantially to Fig. 3 and illustrating two different embodiments of myinvention. Y

In said drawing, 10 denotes the side wall of a car having a dependingplate 11 secured thereto. On the inner side of the plate 11 is securedby rivets a cast-` at its inner end, is mounted in suitable bearingbrackets 16-16 secured to the inner lsides of the center sills y17-17,18-18 denoting chain winding drums from which chains (not shown) extendto the other parts of the door operating mechanism. The casting 14 isprovided at its outer end withV an integral ratchet wheel 19 and on theinterior thereof is provided with a thread 20 with which coperates a lug21 Y formed on a casting 22 having a squared suitably cored to receive apin 25 having a shoulder 26 and threaded inner end 27, whereby said pinmay be held in fixed position by a `nut 28 and lock nut 29. The pin 25extends to the outer side of the plate 11 and has pivotally mountedthereon a pawl 30 adapted to coperate with the ratchet wheel 19. Thepawl 30 on its outer side, is provided with an integral squared section31 of the same size as the squared end 23. The casting 12 is furtherprovided with a hub 32 cored similarly to the hub 24 and having mountedtherein a headed pin 33 similar to the pin 25. The pin 33 has pivotallymounted thereon a cam shaped dog or lock 34 which coperates with thetail piece 35 on the pawl 30. The dog or lock 34 is also provided with asquared section 36 of the same size as the `other squared sections 31and 23. The rivets indicated at 40-40 are suitably countersunk in orderto prevent interference with the pawl and lock when the latter arerotated.

The parts are shown in locked position and in order to release the cardoors, the dog or lock 34 is rotated in a counter-clockwise directionyby aclawbar applied to the squared section 36; the pawl is thenreleased by rotating the same in a counter clockwise direction by thesame claw bar; and finally the shaft 15 is rotated by applying the clawbar to the squared end of the casting 22 and rotating it in acounter-clockwise direction.

To close thecar doors and lock the shaft 15, itis apparent that thereverse of the above described operations will be required, all threemembers being rotated at this time in a clockwise direction.

In the modification shown in Fig. 4E, the casting 112 is the same asthat illustrated in Figs. 1, 2 and 3, but instead of employing pins forthe pawl and dog, the latter are each provided with an integral,shouldered, rounded extension 126 and a reduced end 127, the latterreceiving a cotter pin 128 therethrough. From this description, it willbe seen that the pawl and dog may each oscillate or pivot insubstantially the same manner as the corresponding parts illustrated inFigs. 1, 2 and 3.

In the modiiication shown in Fig. 5, the casting 212 instead of beingprovided with shouldered recesses to receive the pins and extensions ofthe pawl and dog previously described, is provided with integral arms orpins 225 which pass through the depending plate 211 to the outer side ofthe latter and have rotatably or oscillatably mounted thereon the pawl230, the latter'being retained in position by a Cotter or other suitablemeans 228. As will be understood, Figs.

4 and 5 illustrate merely the modifications for the pawl but themountings of the dog will correspond thereto in each instance.

From the preceding description, it will be seen that the workman canoperate the lock, pawl and shaft in the most eflicient manner andwithout having to shift his position since the claw bar will always bemanipulated in the same direction during opening of the doors and viceversa when the doors are closed. Furthermore, by providing the squaredsections 31 and 36 on the pawl and lock, which are similar to thesquared end of the shaft, sledging or mutilation of the pawl and lockwhich has heretofore been customary, Will be avoided and thereby thelife of the parts increased.

I claim: 1. In mechanism of the character described, the combinationwith an operating shaft having a locking member on the end thereof, ofmeans coperating with said locking member to lock the shaft in position,said means including a pawl pivoted about an axis parallel with the aXisof said shaft and coperable with said locking member, and a dogengageable with said pawl and also pivoted about an axis parallel withthe axis of said shaft, said shaft, pawl and dog being each providedwith anintegral squared portion of the same size, said shaft, pawl anddog being all rotated in the same direction to release the operatingshaft.

.shaft is being released or moved to locked position.

3. In mechanism of the character described, the combination with acasting having a bearing and two cored hubs, of a shaft rotatablymounted in said bearing, shouldered pins'mou'nted in said cored hubs andrigidly attachedV to said casting, a pawl pivotally mounted on one ofsaid pins, and a lock pivotally mounted on the other of said pins.

4. In mechanism of the character described, the combination with anoperating shaft having a ratchet wheel iiXedly associated therewith anda member relatively rotatably associated with said ratchet wheel, saidmember having a squared operating end, of a pawl coperating with saidratchet wheel and having a squared operating section, and a dogcoperable with said pawl and having also a squared operating section,said member, pawl and dog being all rotated inthe same direction toeffect the un- Winding movement of the shaft.

5. In a mechanism of the character described, the combination with acasting adapted to be secured to a portion of a car, said casting beingprovided with a bearing for a shaft, of a pawl adapted to cooperate withsaid shaft, a dog adapted to coperate with said pawl and means forvpivotally attaching said pawl and dog to said casting.

6. In a mechanism of the vcharacter described, the combination with acasting adapted to be secured to a portion of a car, said casting beingprovided with a bearing for a shaft, of a pawl adapted to cooperate withsaid shaft, a dog adapted to cooperate with said pawl and means forpivotally attaching said pawl and dog to said casting, said meansincluding shouldered sockets formed in said casting and correspondinglyshouldered members extending inwardly from said pawl and dog into saidsockets and fitting the latter.

In witness that I claim the foregoing I have hereunto subscribed my namethis 7th day of February, 1916.

. ARGYLE CAMPBELL.

Copies of this patent may be'obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

